stefanfrede’s gists

stefanfrede / osx-for-hackers.sh

Last active August 29, 2015 14:24 — forked from brandonb927/osx-for-hackers.sh

	#!/bin/sh

	# Alot of these configs have been taken from the various places
	# on the web, most from here
	# https://github.com/mathiasbynens/dotfiles/blob/master/.osx

	# Set the colours you can use
	black='\033[0;30m'
	white='\033[0;37m'
	red='\033[0;31m'

stefanfrede / array_filter_and_sort.js

Created January 30, 2016 08:44

Filter an array of strings to remove duplicates and sort it alphabetically.

var keywords = ['do', 'if', 'in', 'for', 'new', 'try', 'var', 'case', 'else', 'enum', 'null', 'this', 'true', 'void', 'with', 'break', 'catch', 'class', 'const', 'false', 'super', 'throw', 'while', 'delete', 'export', 'import', 'return', 'switch', 'typeof', 'default', 'extends', 'finally', 'continue', 'debugger', 'function', 'do', 'if', 'in', 'for', 'int', 'new', 'try', 'var', 'byte', 'case', 'char', 'else', 'enum', 'goto', 'long', 'null', 'this', 'true', 'void', 'with', 'break', 'catch', 'class', 'const', 'false', 'final', 'float', 'short', 'super', 'throw', 'while', 'delete', 'double', 'export', 'import', 'native', 'public', 'return', 'static', 'switch', 'throws', 'typeof', 'boolean', 'default', 'extends', 'finally', 'package', 'private', 'abstract', 'continue', 'debugger', 'function', 'volatile', 'interface', 'protected', 'transient', 'implements', 'instanceof', 'synchronized', 'do', 'if', 'in', 'for', 'let', 'new', 'try', 'var', 'case', 'else', 'enum', 'eval', 'null', 'this', 'true', 'void', 'with', 'brea

stefanfrede / array_empty.js

Created January 30, 2016 08:47

The most performant way to empty an array.

	/**
	* Example:
	* var foo = [ 1,2,3 ];
	* emptyArray( foo );
	* console.log( foo );
	* // []
	*/

	function emptyArray( arr ) {
	//empty the array

stefanfrede / array_shuffle.js

Created January 30, 2016 08:50

This snippet here uses Fisher-Yates Shuffling Algorithm (https://www.wikiwand.com/en/Fisher–Yates_shuffle) to shuffle a given array.

	/**
	* Example:
	* var a = [ 1, 2, 3, 4, 5, 6, 7, 8 ];
	* var b = shuffleArray( a );
	* console.log(b);
	* // [2, 7, 8, 6, 5, 3, 1, 4]
	*/

	function shuffleArray( arr ) {
	var i,

stefanfrede / convert_truthy_falsy.js

Created February 1, 2016 06:34

Convert a truthy or falsy value to true boolean with the !! operator.

	!!"" // false
	!!0 // false
	!!null // false
	!!undefined // false
	!!NaN // false

	!!"hello" // true
	!!1 // true
	!!{} // true
	!![] // true

stefanfrede / function_convert_arguments_to_array.js

Last active June 7, 2016 05:08

Convert arguments, an array-like object, into an array.

	/**
	* Common practice to convert arguments into an array:
	*/

	var args = Array.prototype.slice.call(arguments);

	/* or the shorthand */

	var args = [].slice.call(arguments);

stefanfrede / array_flatten.js

Created February 8, 2016 09:47

These are the three ways to merge a multidimensional array into a single array.

	/**
	* Given:
	* var myArray = [[1, 2],[3, 4, 5], [6, 7, 8, 9]];
	*
	* Result:
	* // [1, 2, 3, 4, 5, 6, 7, 8, 9]
	*/

	// Using concat() and apply()
	var myNewArray1 = [].concat.apply([], myArray);

stefanfrede / array_deduplicate.js

Created February 8, 2016 09:58

How to remove duplicate elements, of different data types, from an Array.

	/**
	* Primitives
	*/

	// If an Array only contains primitive values, we can deduplicate it by only using the filter and indexOf methods.
	var deduped = [ 1, 1, 'a', 'a' ].filter(function (el, i, arr) {
	return arr.indexOf(el) === i;
	});
	console.log(deduped); // [ 1, 'a' ]

stefanfrede / anki_code_js.txt

Last active January 27, 2018 08:20

Latex snippet for Anki to preview JavaScript code.

	// Inline
	[latex]\mintinline[bgcolor=black]{js}\|...code goes here...\|[/latex]

	// Multi line

	[latex]
	\begin{minted}
	[
	frame=lines,
	framesep=2mm,

stefanfrede / partial_application_recipes.js

Last active June 27, 2016 05:34

Quickly and simply apply a single argument.

	// leftmost
	const callFirst = (fn, larg) =>
	function (...rest) {
	return fn.call(this, larg, ...rest);
	}

	// rightmost
	const callLast = (fn, rarg) =>
	function (...rest) {
	return fn.call(this, ...rest, rarg);

Stefan Frede stefanfrede